Oarriage-spbing



M. G. HUBBARD.

Carriage-Spring.

AM.PHOT0-LITHD. C0,N.( (DSBORNE'S PROCESS.)

2 Sheets-Sheet 1.

Patent ed July 22. 185'].

UNITED STATES PATENT OFFICE.

M.- G. HUBBARD, or ROCHESTER, NEW, YORK.

CARRIAGE-SPRING.

i Specification of Letters Patent 8,244, dated July 22, 1851.

To all whom/it may concern: a i a Be it known that I, M. G. HUBBARD, of

Rochester, in the county of Monroe and State of New York,have invented a new and useful Improvement in Carriage- Springs, andthat thefollowing is a full, clear, and exact description of the principle or character which distinguishes it from all other things before known andof the usual manner of making, modifying, and using the same, reference being had to the accompanying drawing, making a part hereof, in Which b a Figure 1 isa side elevation and Fig. 2 a view of the under side.

My improvement consists in forming a,

spring of a straight bar of steel, of proper dimensions, and equal thickness throughout,

attaching it'to the carriage so as to be compensating and self adjusting to any Weight that the carriage is capable of sustaining, by which means I form a durable, cheap, and efiicient spring of great lightness, that cannot be set or made tostrike when brought entirely down to its bearing.

The construction is as follows: Thebody of the carriage (a) is of any form, asthe invention is equally applicable to a stage coach or buggy; the bottom of the carriage is made convex, likea rocker, either by making a sunk bottom of that form, or adding a piece of Wood (6) for the purpose on each side of the carriage bottom; I then take two bars (0) of spring steel, of equal dimensions throughout, and of a size suitable for the answer the purpose. These bars are attached to the hind axle, one on each side, and

passing along under the rockers (b) which rest on them, extend up in an inclined direction to the body of the carriage in front, Where each is firmly bolted; at its extreme forward end similar bars (cl) are inlike rocker, and gradually grow shorter, and of course stronger, althoughthe same size is maintained throughout, thereby getting rid of a great difliculty in construction Which I have found in properly tapering the spring reaches of my former patent; a long staple (e) is put around the springs at the center allow them sufiicient play. I v

Having thus fully described my improved spring reaches for carriages, What I claim therein as new, and, for which I desire to secure Letters Patent, isb The combination of the rockers and spring bars of a carriage, substantially as herein set forth, and for the purposes described. a

I/Vitnesses WM. GREENOUGH, DAVID RooT.

M. G. HUBBARD. a

service, or instead thereof, Wooden bars will a of the rocker to keep them in place, and a 

